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Commit 5779e3c0 authored by Donglin Peng's avatar Donglin Peng Committed by Steven Rostedt (Google)
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LoongArch: ftrace: Enable HAVE_FUNCTION_GRAPH_RETVAL



The previous patch ("function_graph: Support recording and printing
the return value of function") has laid the groundwork for the for
the funcgraph-retval, and this modification makes it available on
the LoongArch platform.

We introduce a new structure called fgraph_ret_regs for the LoongArch
platform to hold return registers and the frame pointer. We then fill
its content in the return_to_handler and pass its address to the
function ftrace_return_to_handler to record the return value.

Link: https://lkml.kernel.org/r/c5462255e435fab363895c2d7433bc0f5a140411.1680954589.git.pengdonglin@sangfor.com.cn

Reviewed-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
Signed-off-by: default avatarDonglin Peng <pengdonglin@sangfor.com.cn>
Signed-off-by: default avatarSteven Rostedt (Google) <rostedt@goodmis.org>
parent d938ba17
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